Lake El'gygytgyn (Chukchi: Эльгыгытгын) is an impact crater lake located in the Chukotka Autonomous Okrug in northeast Siberia, about 150 km southeast of Chaunskaya Bay. It is drained to the southeast by the Enmybaam branch of the Belaya River. It is approximately 12 km in diameter and has a maximum depth of 174 m +/- 2m.